Hi. I'm asking for opinions on when it becomes necessary to replace the factory ECM with an aftermarket system.
I have a '97 Cobra with the LLX4 ECU. The car has been tuned with an SCT chip and uses a Diablo MAFia.
The engine is +.020 w/ stock stroke. (283)
Ported "C" heads w/ FR500 valves and valvetrain
degreed '04 Mach 1 cams
Manley rods, CP pistons (9.0:1, I believe)
Sullivan U/L and 1" spacer
BBK twin 62mm TB
twin 61mm turbos (old HP kit) full 3" exhaust, dumps at axle
120# injectors (Accleronics injector driver)
3 255lph pumps(Fore hat in 03-04 Cobra tank)
-10 feed, -6 return, aftermarket rails, Weldon FPR
MAF in 4" tube w/ honeycomb before sensor
Car runs on E54 only.
Drivability is great. Cold/hot start is great. Idle is great. Basically, it's like stock.
Here's the reason for the question. The car makes 880/793 SAE @ 22 psi and 19* of timing at 6500 rpm. I have been considering changing camshafts and adding a few more degrees of timing. I'd like to turn about 7500 rpm, as I think this is where the Sullivan would rather be.
I am thinking that I may be at the limits of the factory ECU in terms of speed/ability/reliability. Do you think this is safe or wise?
This is strictly a street car, so it's not seeing WOT all of the time.
I have a '97 Cobra with the LLX4 ECU. The car has been tuned with an SCT chip and uses a Diablo MAFia.
The engine is +.020 w/ stock stroke. (283)
Ported "C" heads w/ FR500 valves and valvetrain
degreed '04 Mach 1 cams
Manley rods, CP pistons (9.0:1, I believe)
Sullivan U/L and 1" spacer
BBK twin 62mm TB
twin 61mm turbos (old HP kit) full 3" exhaust, dumps at axle
120# injectors (Accleronics injector driver)
3 255lph pumps(Fore hat in 03-04 Cobra tank)
-10 feed, -6 return, aftermarket rails, Weldon FPR
MAF in 4" tube w/ honeycomb before sensor
Car runs on E54 only.
Drivability is great. Cold/hot start is great. Idle is great. Basically, it's like stock.
Here's the reason for the question. The car makes 880/793 SAE @ 22 psi and 19* of timing at 6500 rpm. I have been considering changing camshafts and adding a few more degrees of timing. I'd like to turn about 7500 rpm, as I think this is where the Sullivan would rather be.
I am thinking that I may be at the limits of the factory ECU in terms of speed/ability/reliability. Do you think this is safe or wise?
This is strictly a street car, so it's not seeing WOT all of the time.